Volatile organic compound (VOC) testing device of medical instrument containing gas pipeline

Abstract

The utility model discloses a medical instrument VOC testing device containing a gas pipeline, which comprises a pure gas source cabin and a VOC testing cabin, a main pipeline is arranged in the VOC testing cabin and is communicated with a gas conveying pipeline, the end part of the main pipeline extends into a to-be-tested cavity of the VOC testing cabin, the main pipeline is also communicated with a gas distributing pipeline, and the gas distributing pipeline is communicated with a gas pipeline. The end part of the gas distribution pipeline is connected with a three-way head, an external test sampling head, a pipeline test sampling head and a standard substance sampling head are arranged on the outer wall of the VOC test cabin, each sampling head is correspondingly connected with a sampling pipe, and the sampling pipe corresponding to the standard substance sampling head is connected with one gas outlet head of the three-way head through a connecting pipe. According to the utility model, the pipeline and the sampling head are additionally arranged, when the VOC test is carried out on the outside of the medical instrument, the VOC test is carried out on the inside of the gas pipeline on the medical instrument containing the gas pipeline, and the sampling head of a standard control group is designed during the test.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical device testing, and in particular relates to a VOC testing device for medical devices containing a gas pipeline. Background Art

[0002] Driven by factors such as the accelerated aging population and the upgrading of residents' consumption, the market for home medical devices, especially respiratory devices, is developing rapidly in my country, becoming one of the fastest growing sub-industries in the field of medical devices. Medical devices with gas pipelines are required to measure VOC release under the worst conditions of clinical use. The VOC environmental test chambers currently available on the market mainly test the inside and outside of the samples to be tested, and do not test the gas pipelines of medical devices. Therefore, we propose a test device for detecting the inside of the gas pipeline. Utility Model Content

[0003] The technical problem to be solved by the present invention is to address the deficiencies of the above-mentioned prior art and to provide a VOC testing device for a medical device containing a gas pipeline, which can perform VOC testing on the outside of the medical device while also being able to perform VOC testing on the gas pipeline of the medical device.

[0004] The technical scheme adopted by the utility model is: a VOC testing device for medical equipment containing a gas pipeline, comprising a pure gas source cabin and a VOC testing cabin, the pure gas source cabin is connected to the VOC testing cabin through a gas transmission pipeline, a main pipeline is arranged in the VOC testing cabin and is connected to the gas transmission pipeline, the end of the main pipeline extends into a cavity to be tested in the VOC testing cabin, the main pipeline is also connected to a gas distribution pipeline, the end of the gas distribution pipeline is connected to a three-way head, the air inlet head of the three-way head is connected to the gas distribution pipeline, and the air outlet heads are all located in the cavity to be tested, the outer wall of the VOC testing cabin is provided with an external test sampling head, a pipeline test sampling head and a standard product sampling head, each sampling head is respectively connected to a sampling tube, the air inlet end of the sampling tube is located in the VOC testing cabin, and the sampling tube corresponding to the standard product sampling head is connected to an air outlet head of the three-way head through a connecting pipe.

[0005] Preferably, corresponding electromagnetic valves are respectively installed on the two air outlet heads of the three-way head.

[0006] Preferably, an exhaust branch is provided on the sampling tube connected to the standard sample sampling head and the pipeline test sampling head, and a flow valve is installed on the exhaust branch.

[0007] The beneficial effect of the utility model is that the utility model adds pipelines and sampling heads, and when performing VOC testing on the outside of medical devices, VOC testing inside the gas pipelines of medical devices containing gas pipelines is performed at the same time, and a sampling head for a standard control group is designed during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of the utility model.

[0009] In the figure: 1. Pure gas source cabin; 2. VOC test cabin; 3. Gas transmission pipeline; 4. Main pipeline; 5. Gas distribution pipeline; 6. Three-way head; 7. Test chamber; 8. External test sampling head; 9. Pipeline test sampling head; 10. Standard product sampling head; 11. Connecting pipe; 12. Standard gas outlet; 13. Pipeline gas outlet; 14. External test sampling inlet; 15. Pipeline test sampling inlet; 16. Standard product sampling inlet. DETAILED DESCRIPTION

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0011] Example

[0012] like Figure 1 As shown, the VOC test device for medical devices with gas pipelines provided in this embodiment includes a pure gas source cabin 1 and a VOC test cabin 2. The pure gas source cabin 1 is an existing mature technology, which is equipped with a high-temperature cleaning system, a constant temperature system, a constant humidity system and a pressurization system, which can provide the VOC test cabin 2 with pure gas required by standard testing;

[0013] The VOC test chamber 2 is provided with a sealed test chamber 7, the front of the test chamber 7 is a sealed test chamber door that can be opened and closed, and the test chamber 7 is provided with a placement platform for placing the test product; the VOC test chamber 2 is connected to the gas transmission pipeline 3 of the pure gas source chamber 1 through the main pipe 4, and the end of the main pipe 4 away from the pure gas source chamber 1 is located in the test chamber 7. In this embodiment, the end of the main pipe 4 located in the test chamber 7 is connected to an external test outlet, and the external test outlet is sealed and embedded in the inner wall of one side of the test chamber 7; the main pipe 4 is also connected to the gas supply pipeline 3 of the pure gas source chamber 1. There is a gas distribution pipeline 5, and one end of the gas distribution pipeline 5 away from the main pipeline 4 is connected to a three-way head 6, the gas inlet end of the three-way head 6 is connected to the end of the gas distribution pipe, and the two gas outlet heads of the three-way head 6 are both located in the chamber to be tested 7. In this embodiment, one gas outlet head is connected to a standard gas outlet 12, and the other gas outlet head is connected to a pipeline gas outlet 13. The standard gas outlet 12 and the pipeline gas outlet 13 are both sealed and embedded on the inner wall of the chamber to be tested 7 where an external test outlet is installed; electromagnetic valves are installed on the standard gas outlet 12 and the pipeline gas outlet 13;

[0014] An external test sampling head 8, a pipeline test sampling head 9 and a standard sample sampling head 10 are provided on the front outer wall of the VOC test chamber 2; the external test sampling head 8 is connected to the chamber to be tested 7 through a sampling tube and is connected to an external test sampling air inlet 14, the pipeline test sampling head 9 is connected to the chamber to be tested 7 through a sampling tube and is connected to a pipeline test sampling air inlet 15, the standard sample sampling head 10 is connected to the chamber to be tested 7 through a sampling tube and is connected to a standard sample sampling air inlet 16, the standard gas outlet 12 and the standard sample sampling air inlet 16 are connected by a connecting tube 11, and the connecting tube 11 is made of 304 stainless steel.

[0015] When in use, the medical device to be tested is placed in the test cavity 7, and then the pipeline gas outlet 13 is connected to the gas pipeline inlet end of the medical device to be tested, the pipeline test sampling inlet 15 is connected to the gas outlet end of the medical device to be tested, the door of the test cavity 7 is closed, the pure gas source cabin 1 supplies standard test gas, and the pure gas is sent into the test cavity 7 through the main pipeline 4 to perform the external VOC release test of the medical device. The test gas can be sampled at the external test sampling head 8 through the external test sampling inlet 14 and the sampling tube; at the same time, the pure gas passes through the branch pipe and the three-way head 6, enters the standard gas outlet 12 and the pipeline gas outlet 13, and the standard gas outlet 12 can be sampled at the standard sampling head 1 through the connecting pipe 11 and the standard sample sampling inlet 16 0 for sampling; the pipeline gas outlet 13 delivers pure gas into the internal pipeline of the medical device, and then delivers the test gas into the pipeline test sampling inlet 15 through the outlet end of the gas pipeline of the medical device, and then through the sampling tube to the pipeline test sampling head 9 for sampling; since the pipeline test sampling head 9 and the standard sampling head 10 require a small sampling pressure, that is, a slow sampling flow rate, an exhaust branch is connected to the sampling tube connected to the pipeline test sampling head 9 and the standard sampling head 10, and a flow valve is installed on the exhaust branch. Preferably, a flow valve can also be installed on the sampling tube connected to the pipeline test sampling head 9 and the standard sampling head 10, so as to ensure that the air pressure at the pipeline test sampling head 9 and the standard sampling head 10 meets the sampling standard.

[0016] The above is only a preferred implementation of the present invention, but the protection scope of the present invention is not limited thereto, and any modification and replacement based on the technical solution and inventive concept provided by the present invention should be included in the protection scope of the present invention.

Claims

1. A VOC testing device for a medical device having a gas pipeline, comprising a pure gas source chamber (1) and a VOC testing chamber (2), characterized in that: The pure gas source cabin (1) is connected to the VOC test cabin (2) via a gas transmission pipeline (3); a main pipeline (4) is provided in the VOC test cabin (2) and is connected to the gas transmission pipeline (3); the end of the main pipeline (4) extends into the test chamber (7) of the VOC test cabin (2); a gas distribution pipeline (5) is also connected to the main pipeline (4); the end of the gas distribution pipeline (5) is connected to a three-way head (6); the gas inlet head of the three-way head (6) is connected to the gas distribution pipeline (5); and the gas outlet heads are both located in the test chamber (7); an external test sampling head (8), a pipeline test sampling head (9) and a standard sample sampling head (10) are provided on the outer wall of the VOC test cabin (2); each sampling head is respectively connected to a corresponding sampling tube; the gas inlet end of the sampling tube is located in the VOC test cabin (2); and the sampling tube corresponding to the standard sample sampling head (10) is connected to an gas outlet head of the three-way head (6) via a connecting pipe (11).

2. A VOC testing device for a medical device having a gas pipeline according to claim 1, characterized in that: Corresponding electromagnetic valves are respectively installed on the two gas outlet heads of the three-way head (6).

3. A VOC testing device for a medical device having a gas pipeline according to claim 1, characterized in that: An exhaust branch is also provided on the sampling tube connected to the standard sample sampling head (10) and the pipeline test sampling head (9), and a flow valve is installed on the exhaust branch.

Images